by charging high shipping rates
Mostly it was because of the massive price of the war reparations that the German country was forced to pay after the war. They had to pay for reparation in all places that were ruined in war and they thought that this was extremely unfair to them, especially since they weren't even invited when the treaty was being made.
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7.. you answered the question in the question! :)
Being this political cartoon takes an isolationist viewpoint regarding the events leading to World War II, a piece of evidence which would support the cartoon would be the Neutrality Acts of 1935, 1936, and 1937. These acts prevented trade and travel with any aggressive country. These rules are connected to how the US got involved in WWI and therefore was an attempt to prevent that once again.
A challenge to the cartoon would be the Lend-Lease Act which officially allowed the selling of arms on credit to non-aggressive countries. Essentially allowing the US to trade openly with the Allies and most important Great Britain. This act shows the US's hand and reveals who the government wished to side with if we were to enter the war.
The spirit has been kept alive in some ways. The US population shows until these days a huge sentiment for the 9/11 Attacks, it's a very sensitive subject for the americans and it's always going to be. However, in order to improve ourselves we need to get to know the other cultures, and be united not only among our people, but the whole world.
